Separable fastener



F.' S. CARR.

SEPARABLE FASTNR. APPLICATION man IAN.16, 192m Patente Sept.' 14,1920.

P. l l l I l l l I l l I l I I I L.

UNITED STATES PATENT OFFICE.

FEEDS. GARR, or' NEWTON, MASSACHUSETTS, AssreNoR TO CARR FASTENERCOMPANY, or CAMBRIDGE, MASsACHUSETTs-A CORPORATION or MAINE.

snrARABLE4 FASTENER.

To all whom it may Concern.'

Be it known that I, FRED S. CARR, a citizen of the United States, andresident of Newton, in the county of Middlesex and Commonwealth OfMassachusetts, have invented an Improvement in Separable Fasteners, ofwhich the following description, in connection with the accompanyingdrawings, is a specification, like characters on the drawingsrepresenting like parts.

This invention pertains to improvements in separable fasteners.

It is among the objects of the invention to provide a separable fastenerof simple and rugged construction, providing against separation byforces resulting from lateral strain.

Referring to the drawings, which show a preferred embodiment of one formof my invention: l

Figure 1 is an elevation of two pieces of fabric secured together by apreferred form Of fastener;

Fig. 2 is a section on the line 2-2 of Fig. 1;

Fig. 3 shows two pieces of fabric secured together by a plurality ofsuch fasteners;

Fig. 4: is a front elevation of a preferred form of socket shown in Fig.2; and

Fig. 5 is a View of the spring used in the preferred form of socketherein illustrated.

Referring to the drawings and to the preferred form of my inventionselected for illustrative purposes, l have shown the stud 6 secured tostud-carrying fabric 7 in any suitable way, but preferably by sewing,and coperating with a socket including a casing 8, secured tosocket-carrying fabric 9 in any suitable way, but preferably by sewing.The casing 8 contains a spring 10, preferably flat and stamped fromsheet metal, and having a stud-receiving aperture 11 therein, suchstud-receiving aperture preferably being provided with a plurality ofnotches, such notches being preferably of a diameter somewhat smaller attheir openings than the diameter of the neck of the stud so that thestud cannot enter in a notch sufficient to become locked therein againsta separating stra-in produced by tipping or axial move ment of the studrelative to the socket in a direction somewhat greater than that whichis likely to result from lateral strains on the stud and socket carryingfabrics.

rllhe socket casing is preferably apertured specification of LettersPatent. Patented Sept. 14, 1920.

Application led January 16, 1920.A Serial No. 351,784. i

to provide sewing holes, and the spring may be notched to facilitatepassage of the threads.

The spring 10 is` provided with a slot or other Opening 12, and one ofthe notches 13 is preferably opposite the opening 12, and the externaldiameter of the spring is preferably proportioned to the internaldiameter of the spring-containing casing so that when strain is exertedbetween stud and socket in such a directon as to bring the neck of thestud directly vtoward the aperture 13 adjacent the slot 12, the springcannot open sufliciently to permit complete locking of the stud in thesocket in such a way as to preclude separation thereof by strain in aseparating direction, as distinguished from lateral strain or a forceresultant from lateral strain.

The notches 13 are preferably, as shown, arranged about the interior ofthe spring in such a way that strain in almost any lateral directionwill produce locking of the stud and' socket either by direct partialentrance of the neck of the stud into a notch, or by such entrancepursuant to a slight camming action of the stud on an inclined surfaceof the stud-receiving aperture.

The aperture in the spring is preferably such that when the stud isentered therein, there will be a slight pressure of the spring on thesides of the neck of the stud. The notches are preferably of such adiameter as to enable the stud to enter therein a distance less thanone-half of the diameter of the neck, thus providing engagement betweenthe stud and the sides of the adjacent notch without bottoming of thestud in the notch.

It will be understood that I use the word fabric in its broader sense toinclude not only woven materials, but any flexible carrying medium.

While I have shown and described a preferred form of one embodiment ofmy invention, it will be understood that a number of changes involvingomission, substitution, alteration and reversal of parts, and evenchanges in the mode of Operation, may be made without departing from thescope of my invention, which is best defined in the following claims.

Claims: v

1. A separable` fastener comprising, in combination, a stud having aheadand a neck; a socket for engagement with said stud including a springhaving a stud-re` ceiving aperture therein, split at one side andproviding as a part of the stud-receiving aperture a plurality ofnotches, said notches of less width than the major diameter of the neckof said stud.

2. A separable fastener comprising, in combination, a stud having a headand a neck; a socket for engagement with said stud including a springhaving a stud-receiving aperture therein, split at one side andproviding as a part .of the studfneceiving aperture a plurality ofnotches, said notches of less Width than the major diameter of the neckof said stud, and said spring adapted to closely engage the neck of saidstud when engaged therewith.

3. A separable fastener comprising, in combination, a stud having a headand a neck; and a socket for engagement with said stud including acasing providing a flangedover marginal portion, a Hat spring in saideasing having a stud-receiving opening therethrough, said spring andcasing -proporvtioned to prevent engagement of the neck neck; a socketfor engagement With said Y stud including a spring having astud-receiving aperture therein, `split at one side and providing as apart of the stud-receiving aperture a plurality of notches, the neck ofsaid Vstud enterable in any one of .said notches a `distance less thanyone-hakt the diameter of said neck. Y

v In testimony whereof, I have signed my name to this specification.

FRED S. CARR. i

